The following code allows you to specify the speed in meters per second:
Code:
# Speed in meters per second
SPEED = 1
def updateGroup():
# Get the elapsed time since the previous frame and multiply that against the speed in m/s
groupTracker.setPosition([0,0,SPEED * viz.getFrameElapsed()],viz.REL_LOCAL)
vizact.onupdate(0,updateGroup)